Re: Using same port number to connect more than one application to
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I'm sure it's possible, forget the CAsynSocket first, just think what we
need to do, I think you mean is that you want to develop the common C/S
program.
The server side use sever socket to listen on one port for the come in
connection, once you accept one come in connection, you get a new socket
client which can talk to the remote client.
What's the trouble you meet, one, you don't want to create a new client
when you accept one? two, if you create the new socket client for connect
with the remote side, how to ident the remote side like username? the better
way is inherited form CSocket and then add more member like ClientName etc.
What's mean of create a new socket client, this do nothing on your server
socket object but just create a new socket for the connection that establish
by the server and the one client but not others.
The main mistake may be that you need create a new socket and pass in the
Accept function, after that you need put the client into list or vector
which is you member list.
The server socket and the client socket is the same MFC class(maybe it's
wrong), just different to use :)
I develop one chat program use C#, and I understand why you want to use
Asyn way to avoid thread problem and improve the performance, the trouble is
that once you use Asyn way, the logical is a little hard to control than the
synchronize way IMHO.
remember class CSocket : public CAsyncSocket :)
"nexolite" <nexolite@discussions.microsoft.com> ????????????
news:F6AA6704-7F3F-453B-9E05-7EB4EF8F03CD@microsoft.com...
No reason I can imagine this would be possible.
It would be the role of your server to decide that an incoming message
from X should be
sent to Y and an incoming message from Y should be sent to X. You would
write code to
manage this and do it.
Note that you have still not shown the code that is causing the problem.
*************
Even I know this is possible, and obviously I was not able to write code
properly,
that's why I asked you, since you and others here are much experienced!
Also I cannot use code from other sources , Here I have to use my own
code.
and I was not believing on my code thinking it is completely wrong.
OK , here is my code .
#include<afxwin.h>
#include<afxsock.h>
#include<vector>
#include "resource.h"
using namespace std;
class ConnectionManagerDialog : public CDialog
{
public:
int i;
CListBox from,to;
ConnectionManagerDialog(int n):CDialog(n){i=0;}
void OnAccept();
void OnRecieve();
BOOL OnInitDialog();
};
class ConSock : public CAsyncSocket
{
public:
CDialog *pwnd;
void SetParent(CDialog *mpwnd)
{
pwnd=mpwnd;
}
void OnAccept(int nErrorCode)
{
if (nErrorCode == 0)
((ConnectionManagerDialog*)pwnd)->OnAccept();
CAsyncSocket::OnAccept(nErrorCode);
}
void OnReceive(int nErrorCode)
{
if(nErrorCode==0)
((ConnectionManagerDialog*)pwnd)->OnRecieve();
CAsyncSocket::OnReceive(nErrorCode);
}
}serv,serv1;
vector<ConSock*> servs; //To store the socks created with 'new'
BOOL ConnectionManagerDialog::OnInitDialog()
{
AfxSocketInit();
serv.SetParent(this);
if(serv.Create(4945))
{
if(serv.Listen())
MessageBox("listening");
else MessageBox("listen failed");
}
else{
MessageBox("create sock failed");
}
return CDialog::OnInitDialog();
}
void ConnectionManagerDialog::OnAccept()
{
ConSock *servn = new ConSock;
servs.push_back(servn);
serv.Accept(*servn);
}
void ConnectionManagerDialog::OnRecieve()
{
/*loop through all the servs[]->recive()
Since I dont understand how I come to know for which this OnRecieve() was
called I loop through all!
and even this does not work properly , properly means according to me it
should receive data from the socket for which OnRecieve was called
and send "hello" (only for testing) to it*/
/*This is the place where I m STUCK!!!*/
char data[100];
int read;
for(int i=0;i<(int)servs.size();i++)
{
read=servs[i]->Receive(data,100*sizeof(char));
if(read>0)
servs[i]->Send("hello",sizeof("hello"));
}
CString str;
str.Format("\nBytes Read=%d",read);
OutputDebugString(str);
TRACE(data);
if(read==SOCKET_ERROR)
{MessageBox("SOCKET_ERROR");
}
else{
data[read]=NULL;
OutputDebugString(data);
}
}
class ConnectionManagerApp:public CWinApp
{
public:
int InitApplication()
{
ConnectionManagerDialog d(IDD_DIALOG1);
m_pMainWnd=&d;
d.DoModal();
return TRUE;
}
}a;
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